feat(前端状态): 添加运维监控状态管理和路由

- 新增 adminSettings store 管理 ops 配置状态
- 注册 adminSettings store 到全局 store
- 添加 ops 监控相关路由（dashboard, alerts, realtime, settings）

frontend/src/stores/index.ts

@@ -5,6 +5,7 @@
 
 export { useAuthStore } from './auth'
 export { useAppStore } from './app'
+export { useAdminSettingsStore } from './adminSettings'
 export { useSubscriptionStore } from './subscriptions'
 export { useOnboardingStore } from './onboarding'